[root@server ~]# wget
http://dlc.sun.com.edgesuite.net/virtualbox/4.3.18/Oracle_VM_VirtualBox_Extension_Pack-4.3.18-96516.vbox-extpack--2014-10-27 20:16:12--
http://dlc.sun.com.edgesuite.net/virtualbox/4.3.18/Oracle_VM_VirtualBox_Extension_Pack-4.3.18-96516.vbox-extpackRisoluzione di dlc.sun.com.edgesuite.net... 2.228.46.122, 2.228.46.114
Connessione a dlc.sun.com.edgesuite.net|2.228.46.122|:80... connesso.
HTTP richiesta inviata, in attesa di risposta... 200 OK
Lunghezza: 15793634 (15M) [application/x-virtualbox-vbox-extpack]
Salvataggio in: "Oracle_VM_VirtualBox_Extension_Pack-4.3.18-96516.vbox-extpack"
100%[===================================================================================================================>] 15.793.634 852K/s in 18s
2014-10-27 20:16:33 (851 KB/s) - "Oracle_VM_VirtualBox_Extension_Pack-4.3.18-96516.vbox-extpack" salvato [15793634/15793634]
[root@server ~]# vboxmanage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.3.18-96516.vbox-extpack
0%...
Progress state: NS_ERROR_FAILURE
VBoxManage: error: Failed to install "/root/Oracle_VM_VirtualBox_Extension_Pack-4.3.18-96516.vbox-extpack"
VBoxManage: error: Extension pack 'Oracle VM VirtualBox Extension Pack' is already installed. In case of a reinstallation, please uninstall it first
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component ExtPackManager, interface IExtPackManager
VBoxManage: error: Context: "int handleExtPack(HandlerArg*)" at line 1143 of file VBoxManageMisc.cpp
[root@server ~]# vboxmanage list extpacks
Extension Packs: 1
Pack no. 0: Oracle VM VirtualBox Extension Pack
Version: 4.3.0
Revision: 89960
Edition:
Description: USB 2.0 Host Controller, VirtualBox RDP, PXE ROM with E1000 support.
VRDE Module: VBoxVRDP
Usable: true
Why unusable:
[root@server ~]# vboxmanage extpack uninstall Oracle_VM_VirtualBox_Extension_Pack-4.3.0-89960.vbox-extpack
0%...
Progress state: NS_ERROR_FAILURE
VBoxManage: error: Failed to uninstall "Oracle_VM_VirtualBox_Extension_Pack-4.3.0-89960.vbox-extpack"
VBoxManage: error: Invalid extension pack name specified
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component ExtPackManager, interface IExtPackManager
VBoxManage: error: Context: "int handleExtPack(HandlerArg*)" at line 1183 of file VBoxManageMisc.cpp
dove sbaglio?